均布荷载作用下密拼缝叠合板受力机理及有限元分析  

Mechanical mechanism and finite element analysis of laminated slab with split⁃joint under uniform load

作　　者：任彧 杨昱幸 徐沛韬 廖飞宇 REN Yu;YANG Yuxing;XU Peitao;LIAO Feiyu(Fujian Construction Engineering and Prefabrication Research Institute Co.,Ltd.,Fuzhou 350001,China;College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China)

机构地区：[1]福建建工装配式建筑研究院有限公司,福州350001 [2]福建农林大学交通与土木工程学院,福州350002

出　　处：《建筑结构》2023年第17期119-126,共8页Building Structure

基　　金：福建省科技重大专项(2019HZ07011);福建省中青年教师教育科研项目(JAT210087)。

摘　　要：叠合板密拼缝的存在是改变板件受力传递模式的重要因素。为研究密拼缝对板支反力传递路径的影响,考虑不同长宽比和不同密拼缝数量两个变化参数的影响,设计了6块叠合板试件进行足尺静载试验,其中4块为密拼缝叠合板,2块为现浇板件。试验对试件刚度、挠度、裂缝破坏模态及支座反力分布进行了研究和对比,通过ABAQUS有限元软件运用混凝土塑性损伤模型对试验板件进行校准对比分析。结合试验数据及有限元分析结果,指出了密拼缝叠合板在拼缝处的载荷分布以及拼缝影响下的板件破坏模态。研究表明:双拼缝板的整体破坏形式仍趋于双向板受荷下的破坏形式。总体而言,密拼缝板设计中可运用现行双向板设计原理对板件进行保守设计及计算。The existence of split⁃joint in laminated slab is an important factor in changing the force transmission mode of the slab.In order to study the influence of split⁃joint on the transfer path of slab support reaction,considering the influence of two different parameters including different length width ratios and different number of split⁃joints,six specimens of laminated slabs were designed for full⁃scale static load tests,of which four were laminated slabs with split⁃joint and two were cast⁃in⁃situ slabs.The experiment conducted research and comparison on the stiffness,deflection,crack failure mode and support reaction distribution of the test specimens.The ABAQUS finite element software was used to calibrate and analyze the plastic damage model of concrete for the test slabs.Based on experimental data and finite element analysis results,the load distribution at the split⁃joint and the failure mode of the slabs under the influence of the splice were pointed out.The research shows that the overall failure mode of the double split⁃joint slab still tends to that of the bidirectional slab under load.Overall,the design of laminated slab with split⁃joint can be conservatively designed and calculated using the current principles of bidirectional slab design.

关 键 词：密拼缝 叠合板 足尺静载试验 受力性能 失效模式 

分 类 号：TU375[建筑科学—结构工程]